chore(EntityResourceService): consolidate ShouldIncludeRelationships check

Author: jaredcnance

src/JsonApiDotNetCore/Services/EntityResourceService.cs

@@ -4,7 +4,6 @@
 using JsonApiDotNetCore.Data;
 using JsonApiDotNetCore.Extensions;
 using JsonApiDotNetCore.Internal;
-using JsonApiDotNetCore.Internal.Query;
 using JsonApiDotNetCore.Models;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Logging;
@@ -47,7 +46,7 @@ public virtual async Task<IEnumerable<T>> GetAsync()
 
             entities = ApplySortAndFilterQuery(entities);
 
-            if (_jsonApiContext.QuerySet?.IncludedRelationships != null && _jsonApiContext.QuerySet.IncludedRelationships.Count > 0)
+            if (ShouldIncludeRelationships())
                 entities = IncludeRelationships(entities, _jsonApiContext.QuerySet.IncludedRelationships);
 
             if (_jsonApiContext.Options.IncludeTotalRecordCount)
@@ -61,13 +60,16 @@ public virtual async Task<IEnumerable<T>> GetAsync()
         public virtual async Task<T> GetAsync(TId id)
         {
             T entity;
-            if (_jsonApiContext.QuerySet?.IncludedRelationships != null)
+            if (ShouldIncludeRelationships())
                 entity = await GetWithRelationshipsAsync(id);
             else
                 entity = await _entities.GetAsync(id);
             return entity;
         }
 
+        private bool ShouldIncludeRelationships()
+            => (_jsonApiContext.QuerySet?.IncludedRelationships != null && _jsonApiContext.QuerySet.IncludedRelationships.Count > 0);
+
         private async Task<T> GetWithRelationshipsAsync(TId id)
         {
             var query = _entities.Get();